Improvement in toothed cylinders for working cotton, wool



UNITED STATES PATENT OEEIcE. l

FRANK P. PENDLETON, OF PHILADELPHIA, PENNSYLVANIA.v

IMPROVEMEN' INTOOTHED CYLINDERS FOR WORKING COTTON, WOOII., &c.

Specication forming part of Letters Patent No. 210,222, dated November26, 1878; application filed September 19, 1878.

` Fibrous Materials; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference being had to the accompanying drawing, which forms part ofthis` specification, inv which- Figures l, -2, and 3 are verticalcross-sections taken through the body of my improved cylinder. Fig. etis a longitudinal section of a portion thereof. Fig. 5 is a top or sideview; and Figs. 6, 7, and .8 are details, to be hereinafter described. l

In all the figures like letters ot' reference indicate like parts.

My invention relates to that class of toothed cylinders where a toothedor serrated wire is wound and secured in a groove cut spirally in theoutside surface and from end to end of the cylinder; y

Heretofore all such cylinders have been constructed by winding one wireonly in one groove on the cylinder. In cylinders of this class the wireis secured in the groove by calking or jamming down tightly against thewire in the groove part of the metal left standing in a ridge betweenthe convolutions of the grooves around the surface of the cylinder.

In cylinders so constructed it has been found impossible to produce acylinder of more than a limited number of threads per inch, measured inthe direction of the length of the cylinder, for the reason that in afine cylinder the said ridges become so thin that the metal crumblesaway under the tool in the process of calking.

For cheapness of construction and other considerations, it is customaryto make the body of such a cylinder 'of cast-iron. With the bestcast-iron the limit of ineness has been sixteen threads per inch.

For some uses in working tine fibers it has long been desired to producea tine cylinder having more teeth or picking-points in a given area ofsurface.

Now, my improvement aims to supply this want; and consists in windingtwo wires in one groove, cut as described, whereby I am able to make avery fine cylinder without reducing the thickness of the ridges betweenthe grooves to an extent to cause them to crumble in calking. I haveproduced in thismanner a cylinder of twenty-four wires per inch,

and, if necessary, can produce one of thirtytwo wires per inch. p

A cylinder containing my improvements may be constructed of an outershell or casing, A, into which may be tted a head, B,

Fig. 4, and the head B may be elongated into bearings or journals B', orthe journals may be separate from and secured into the head B or anyother arrangement may be used, since my improvement does notv relate tothe onstruction of the frame-work ot' the cylinface and from end to endof the cylinder, and into this groove are wound and secured two distinctwires. The wires maybe of the same or varied character, or have teethot' the-same or varied degrees of neness; but each separate wire must beof the same character and have teeth of the same degree of inenessthroughout its entire length. In Fig. 1 are shown two toothed wires,each like the other. When two like wires are thus used the points of theteeth of one wire should be so placed as to intersect the spaces leftbetween the points of the teeth of the other'wire, as is the case withwires C and C in Fig. 1. y

Fig. 2 shows a toothed wire, (l, and a blaik wire, D, wound in the samegroove.

Fig. 3 shows a toothed wire, C", of a diiferent character than C in Fig.2, and a blank wire, D.

Although I have shownA but two forms of toothed wire, C and C, yet I mayuse wires having teeth of otherdesired shape or {ineness.

Figs. 6, 7, and 8 are longitudinal sections through a portion oftheshell A, made on a magnified scale, so as to show the manner in whichthe wire is inserted in the groove.

In Fig. 6 are shown wires Ck D, whosecrosssections are alike, but whichare reversed 1n winding the wire in the groove, so that the A groove iscut spirally in the outside surribs on the wires shall come together inthe center of the groove. The outlines of the wires, starting from theirpoints, slope at the same angle on either side. C D show the wires setin a groove before calking, and C D" after calking. In this case thespaces between the wires are all alike. Thus the space C to D is alikeand equal to the space D to C.

When the wires are calked their sloping sides form a dovetail in themetal and hold them fast.

In Fig. 7 are shown Wires similar to those shown in Fig. 6, butconstructed with a view to give a sharper angle to the dovetail. C Dshow the wires in a groove before, and C D after, calking. After thewires are secured,

as at C' D', a tool is forced between the wires and the Wires bent orforced outward, so as to bring their points at equal distances one fromthe other, as at C" D. In this case the space C to D" between the wiresis like C to DI in Fig. 6; but the space Dl to 0' has its sidesperpendicular with the face of the cylinder.

Fig. 8 shows wires of triangular cross-section. C D showr the wireswound in a groove before, and C' D after, calking. After securing thewire a tool is forced between the wires, as described in Fig. 7, and thepoints of the teeth forced outward, as` at C" D". In this case the spacebetween G" and Dll is an equilateral triangle, having the pointdownward, and the space D to 0" is the frustum of such triangle, havingthe base down.

What I claim as new, and desire to secure by Letters Patent, is-

1. A cylinder or roll for working brous materials having a spiral groovecut from end to end in its outside surface, in combination with twowires wound and secured in the groove, for the purpose described.

2. The combination of a toothed and a blank wire, both wound and securedin one groove cut spirally from end to end in the outside surface of acylinder, as described.

In testimony that I claim the foregoing 1 have hereunto set my hand this16th day of September, 1878.

FRANK I. PENDLETON. Witnesses C. B. WILKINSON, J. HENRY KNoWLEs.

